Sony Ericsson Cordless DT590 - Manual (Page 103)

103 MD Evolution – Cordless DT590
Group Services
Mobile Extension Service
If you frequently travel outside the office, you will generally have a
GSM mobile phone in addition to your DT590 extension.
Once again, without truly being a group service, the Mobile
Extension service may be of use to you. Its purpose is to allow
external users of GSM mobile phones most particularly to access
your company's network, and thus be able to use the system as if
they were internal users.
In practice, a Mobile Extension terminal is managed in the same
way as a dummy internal user associated with the external GSM
mobile number.
To process these calls, the GSM mobile telephone connects to a
specific DID number for the facility, which accesses the Mobile
Extension server.
By connecting through the public ISDN network, the GSM mobile
telephone is then automatically authenticated by its external calling
number. By default, authentication can be carried out by manually
dialling the dummy internal number associated as well as the
corresponding user's password.
Once authenticated, the GSM mobile telephone user may call any
internal or external number, just as if he/she were dialling from the
internal dummy extension. The user's identity that is transmitted to
the called parties is the information for the internal dummy
extension.
The mobile GSM telephone user may, in the same way, gain access
to all telephone services to which the internal dummy extension has
authorization to access.
The GSM mobile telephone may also be directly called through the
number associated with the internal dummy extension. This may
be used in conjunction with a personal group. However, the GSM
mobile telephone will still retain its regular number.
Note : The Mobile Extension service is also totally
applicable to your residential extension connected to the
pubic ISDN network. Whenever necessary, contact your
system administrator for more information concerning the
availability of this specific service for your telephone facility.